The Nature of Buddhist Ethics, by Damien Keown, is a fine read. He plays a tad fast and loose with the Theravada-Mahayana textual divide, but the point he makes about the pairing of Sila-Panna is worth reading over. I'd get it from a library, rather than buy it.

Peter Harvey is a good author elsewhere (The Selfless Mind), but I'm not certain of his ethical thought. I have one of his books in my to-read pile, I'll get back to you.

"And how is it, bhikkhus, that by protecting oneself one protects others? By the pursuit, development, and cultivation of the four establishments of mindfulness. It is in such a way that by protecting oneself one protects others.

"And how is it, bhikkhus, that by protecting others one protects oneself? By patience, harmlessness, goodwill, and sympathy. It is in such a way that by protecting others one protects oneself.- Sedaka Sutta [SN 47.19]

---The trouble is that you think you have time------Worry is the Interest, paid in advance, on a debt you may never owe------It's not what happens to you in life that is important ~ it's what you do with it ---

My recently moved Blog, containing some of my writings on the Buddha Dhamma, as well as a number of translations from classical Buddhist texts and modern authors, liturgy, etc.: Huifeng's Prajnacara Blog.